Hand exerciser



FIG. 1 is a top left perspective view for a hand exerciser, showing my new design;

FIG. 2 is a front elevational view of FIG. 1 thereof, the rear elevational view being a mirror image;

FIG. 3 is a left side elevational view of FIG. 1 thereof, the right side elevational view being a mirror image; and,

FIG. 4 is a top plan view of FIG. 1 thereof, the bottom plan view being a mirror image.

The broken lines shown in FIG. 1 are for the purpose of illustrating environmental structure, which form no part of the claimed design. 

CLAIM The ornamental design for a hand exerciser, as shown and described. 